https://hal.inria.fr/hal-01131271 Contributor : Marta FranovaConnect in order to contact the contributor Submitted on : Thursday, March 26, 2015 - 10:11:34 AM Last modification on : Saturday, June 25, 2022 - 10:15:46 PM Long-term archiving on: : Monday, April 17, 2017 - 11:42:56 AM